Two-stage hydrovacuum pump



Feb. '17, 1931. T. R. HAYTON (3392,7431

TWO-STAGE HYDROVACUUM PUMP Filed Oct. 14, 1929 2 Sheets-Sheet 1 TWOSTAGE HYDROVACUUM PUMP Filed Oct. 14, 1929 2 Sheets-Sheet 2 30 ml/#4 r Patented Feb. 17, 1931 UNITED STATES PATENT oFFicE THOMAS E. HAYTON, OF APPLETON, WISCONSIN, ASSIGNOR '1'0 HAYTON PUMP AND BLOWER COMPANY, OF APPLETON, WISCONSIN, A CORPORATION OF WISCONSIN TWO-STAGE HYDROVACUUM PUMP Application filed October 14, 1929. Serial No. 399,665.

My invention'relates to pumps and particularly to an improvement on the pump disclosed in my copending application Serial Number 378,900 filed July 17, 1929.

An object of my invention is to provide a two-stage pump adapted for use either as a vacuum or pressure pump and in which the elements shown in my copending application heretofore referred to are duplicated in re- 10 verse position.

The advantages in the construction here disclosed are its adaptability to the development of relatively high pressures, the fact that it is self-priming, and is reversible; that is, may be operated in either direction with the same results.

The invention will be more readily understood by reference to the accompanying drawings, in which Fig. 1 is a sectional elevation on the line 1--1 of Fig. 3;

Fig. 2 is a sectional view on the line 22 of Fig. 1;

Fig. 3 is a sectional view on the line 3-3 of Fig. 1:

Fig. 4 is an elevation or face view of one of the halves of the casing; and

Fig. 5 is a sectional view on the line 5-5 of Fig. 1.

30 In the drawings, I have illustrated a pump *casing consisting of two sections or halves -41 of exactly duplicate construction; that is, so constructed that they are not rights or lefts, eachbeing cast from the same pattern. As shown in Figs. 3 and 4 the casing elements are provided with a continuous peripheral flange 12 apertured to receive bolts 13. A rib 16 having a concentric outer face and an eccentric inner face projects inwardly from the inner face of the casing and serves to form a concentric outer passage 14 and an eccentric inner passage 15. A cylinder 17 projecting laterally from the side wall of the casing provides for packing, and a bracket 18 supports ball bearings that carry the driving shaft 19.

A division wall 20 is provided having a peripheral flange 21 held between the two flanges 12 of the casing, the wall being cast to provide a complementary eccentric rib 16a that registers with but is spaced from the rib the center the division wall is open-at 22 to place the inner passages of the respective chambers in communication.

The impellers are likewise of duplicate con- I struction and are mounted in reversed position. The impellers have a hub 23 fixed to the shaft 19, curved blades 24 extending the width of the space between the wall 10 of the casing and the division wall, a web 25 that extends between the adjacent faces of the ribs 16-16aare outer or peripheral blades or vanes 26 that operate in the concentric space 14.

It will be understood that the parts described are duplicated as to each of the impellers, the only difference being that the impellers are mounted in reversed positions.

As best shown in Fig. 4e, theribs 16-16a are interrupted to provide the entrance port 27, the fluids being deflected into said entrance port by means of the deflector 28, constructed in two halves and held in position by means of the screws 29. These like-wise are duplicated in the respective passages, but are located on opposite sides in the respective chambers in order to be adjacent to their corresponding entrance or exit ports. The construction of the deflector is such that the space 30 therein is substantially exactly equal to the outside dimensions of the outer vanes 26 so thatno fluids except those between the vanes 26 may pass completely around the casing. The deflector therefore serves to divert all other fluids into the eccentric space formed by the ribs.1616a.

*In operation, it being assumed that the impeller is rotating clockwise, as viewed in Fig. 1 and that a. quantity of water is within the casing, fluids will be drawn into the entrance and carried at a high velocity around the concentric space by the action of the-blades 26. If air or gas is being pumped,

the water contained within the casing is continuously supplied to the outer annular space by being forced by centrifugal action through j the spaces separating the ribs 1616a and the web 25, the water being sprayed or broken up and mixed with the incoming air. The body of water and air is drawn toward the outer wall of the annular passage and strikes the deflector 28 at high speed. All the fluid except that between the vanes 26 is directed 'through the port 27 into the inner eccentric passage where it is acted on by the curved blades 24. The water is thrown to the exterior surface of the eccentric passage and theair'oi gas is squeezed into the-passage 24a between the curved vanes. The lessening of the available space as the fluid continues to travel in the eccentric passage crowds the fluid into the space between the vanes and finally into the center space 246. This space is open to the corresponding eccentric passage in the adjacent half of the casing, as best shown in Fig. 3. In this space, the grooved blades are arranged oppositely as best shown in dotted lines in Fig. 1 and the fluids are thrown outwardly by the reversely curved vanes or blades. The fluids'continue their travel and they are forced toward the periphery of the eccentric space and finally squeezed out through the port 27 where they are taken up by the vanes 26, carried around the concentric passage 14 and finally discharged through the tangential outlet 31.

If the operation of the impeller is reversed, the passage 31 becomes the inlet instead of the outlet and the operation is the same.

By the simple means illustrated, I am able to construct a two stage high vacuum pump of relatively high efliciency, all without the use of any valves or moving parts other than the impeller.

The principal reason for operating the first stage impeller in what seems to be a reverse direction is to effect a water sealing effect at all the running joints in the inner chamber of the first stage. The outer blades 26 travel .much faster than the fluid and thus agitate and mix the air and water. while the inner blades by being water sealed prevent leakage of air past the blades and produce the greatest degree of vacuum; the second stage is the main factor in producing pressure.

The form and arrangement of the parts may be changed and modifications made therein without departure from the spirit of my invention.

I claim:

1. A two-stage hydrovacuum pump con1- prising, in combination, a casing and a. division wall dividing the casing to provide two chambers, each chamber having an outer concentric passage, means in each chamber having an inner annular eccentric passage having an opening provid ing communication with the outer passage. said inner passages being in open communication at the center of the casing, means for deflecting fluids from the outer to the inner passages, said eccentric inner passages and deflectors being oppositely disposed in the respective chambers, an impeller in each chamber having vanes operating in the inner and outer passages, and means providing an inlet tangential to one outer passage and an outlet tangential to the other outer passage.

2. A two-stage hydrovacuum pump comprising, in combination, a casing and a division wall dividing the casing to provide two chambers, each chamber having an outer concentric passage, means ineach chamber providing an inner annular eccentric passage having an opening providing communication with the outer passage, said inner passages being in open communication at the center of the casing, means for deflecting fluids from the outer to the inner passages, said eccentric inner passages and deflectors being oppositely disposed in the respective chambers, an impeller in each chamber having vanes operating inboth the inner and outer passages, and means providing an inlet tangential to one outer passage and an -outlet tangential to the other outer passage.

3. In a two-stage hydrovacuum pump, the

combination of a casing and a division wall dividing the easing into two chambers, eccentric ribs projecting inwardly from the inner faces of the casing walls, and eccentric ribs projecting outwardly from the respective faces of the division wall. with a space between the faces of said ribs on the casing and wall, said ribs having interrupted portions providing ports, said ribs serving to 'form an outer concentric space and an inner eccentric space within each chamber. a deflector in the outer concentric spaces adjacent to the ports in said ribs. the ribs in respective chambers being arranged whereby the ports are on opposite sides of the axis of the casing in the respective chambers, and an impeller in each chamber having vanes operating in the inner and outer passages, both impellers adapted for rotation in the same direction.

4. In a two-stage hydrovacuum pump, the combination of a casing and a division wall dividing the casing into two chambers, eccentric ribs projecting inwardly from the inner faces of the casing walls, and eccentric ribs projecting outwardly from the respective faces of the division wall with a space between the faces of said ribs on the casing and wall, said ribs having interrupted portions providing ports, said ribs serving to form an outer concentric space and an inner eccentric space within each chamber, a deflector in the outer concentric spaces adjacent to the ports in said ribs, the ribs in respective chambers being arranged whereby the ports are on opposite sides of the axis of thecasing in the respective chambers, an impeller in each chamber having vanes operating in the inner and outer passages, both impellers adapted for rotation in the same direction, means providing an inlet for fluids to one outer passage, and means providing an outlet for fluids from the outer passage.

5'. In combination, a generally circular pump casing and a wall dividing a space within the easing into two chambers, an eccentric rib having an interrupted portion provided on the inner face of each casing section, the eccentricity of the ribs being at an j angle of degrees on the respective casing sections, the periphery of said ribs being substantially concentric while the inner surface is eccentric thereby forming in each chamber an outer concentric passage and an inner eccentric passage, the eccentric passage of the respective chambers being in communication at the center of the cas1ng,'a deflector arranged in the outer passage adjacent to the ports formed by the interrupted portions and the ribs, means'providing a tangential inletto the outer passage of one chamber, means providing an outlet tangential to the outer passage of the outer chamber, and impellers in each chamber having vanes operating in the inner and outer passages, both impellers mounted for rotation in the same direction.

6. In combination, a generally circular pum casing and a wall dividing a space withln the casingiinto two chambers, an eccentric ribhaving an interrupted portion pro vided on the inner "face-oi each casing section, the eccentricity of the'ribs being 180 degrees on the res ective casing sections,- the. periphery of sai trio, thereby forming in each chamber an outer concentric passage and an inner eccentric passage, the eccentric passage of the respective chambers bein in communication at the center of the casing, a deflector arranged in the outer passage adjacent to the ports formed by the interrupted portions and the ribs, means providing a tangential inlet to the outer passage of the outer chamber, and impellers in each chamber mounted for rotation in the same direction, said impellers having vanes operating in both the inner and outer passages.

In testimony whereof I have afiixed my signature.

THOMAS R. HAYTON.

ribs being substantially concentric while the inner surface is eccen-. 

